Center finder and punch



lvlayy 13, 1947. L P, BROWNy 2,420,350

CENTER FINDER AND PUNCH Filed Aug. 9, 1944 gmc/MSO@ Patented May 13, 1947 UNHTED STATES PATENT OFFICE 3 Claims.

The present invention relates to new and useful improvements in devices for locating the center in round or square stock and for marking the center of the stock when located.

More speoifioaily the invention comprises a frame in the form of a square and having an arm slidably mounted on the frame in parallelism with one side thereof and between which either round or square stock may be positioned together with members slidably mounted on the frame and on the arm and arranged with one end thereof adapted for overlying the center of the work to indicate the center thereof and a pivoted punch carried by one of said members to niarky the center.

A still further object is to provide a device of this character of simple and practical construction, which is ellicient and reliable in performance, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawing forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure l is al plan view showing the centering device in position for locating and marking the center on square stock.

Figure 2 is a side elevational view thereof.

Figure 3 is a sectional view taken-substantially on the line 3--3 of Figure 1; and

Figure 4 is a similar view showing the punch in marking position.

Referring now to the drawing in detail wherein for the purpose of illustration I have disclosed a preferred embodiment of the invention, the numeral 5 designates a frame having right angle portions 5 and l substantially in the form of a square, the upper edges of the portions 5 and 'I being formed with an angular flange 8 marked with graduations 9.

At the junction of the right angle portions 6 and I on the upper surface of the flange 8 is a guide IG in which an elongated ilat bar I I is slidably mounted and secured in adjusted position in the guide by a set screw i2. The base of the guide Ill is provided with a leaf spring i3 engaging the under side of the bar Il to insure substantially tight friction gripping engagement of the bar in the guide when the set screw is released.

The guide IS is arranged to slidably support the bar in a position with one end thereof at a forty-five degree angle with respect to either oi the right angle portions 5 and i as will be apparent from an inspection of Figure l of the drawing. The end of the bar II positioned inwardly of the angle formed by the portions 6 and 'i is formed with an opening Ill and a punch I5 is slidably mounted in the outer end of an arm I5 pivoted, as at Il, to the upper surface of the bar I I, the punch being adapted to enter the opening ifi for marking the center of the work I8 positioned within the angle formed by the portions 6 and l of the frame.

Cooperating with the bar Il in locating the center of the work, is a second bar I9 slidably mounted in a guide 2i) on the upper surface of an arm 2l slidably mounted on the portion E of the frame.

The arm 2l is provided with a downwardly extending bracket 22 having a channel 23 at its lower edge slidably receiving the lower edge of the portion 6 of the frame and the inner edge of the arm is formed with a channel 24 adapted for slidably receiving the outer edge of the flange 8 of the frame, as shown to advantage in Figure 2 of the drawing, the channels 23 and 24 providing guides for sliding the arm 2| along the portion 6 of the frame. The arm ZI is secured in adjusted position on the frame by a set screw 25.

The bar I9 carried by the arm 2| is disposed at right angles to the bar Il and one end of the bar E9 is formed with a ball 25 adapted for overlying and registering with the opening I4 of the bar Il to indicate the center oi the work when the arm 2l is in clamping engagement with one side of the work for holding the work at the inner angle of the frame, as shown in Figure 1 of the drawing. After the center of the work has been ascertained the bar I9 is moved outwardly out of registry with the opening I4 of the bar Il and the punch I5 then moved into position for striking a light blow by a hammer to mark the center of the work.

It will be apparent that the device is adapted for marking the center of either round or square stock.

It is believed the details of construction, operation and advantages of the device will be readily understood from the foregoing without further detailed explanation.

Having thus described the invention, what I claim is:

1. A center nder comprising a frame including right angularly disposed portions, an elongated member slidably carried by the frame at the junction of said portions, and a second elongated member adjustably carried by the frame, each of said members havingan end adapted for cooperating with each other in indicating the center of Work positioned at the inner angle of the frame.

2. A center nder comprising a frame including right angularly disposed portions adapted for receiving Work at the inner angle thereof, and a pair of elongated members carried by the frame at right angles to each other, one of said members beingpositioned at an angle of 45`with re'- spect to both of said right angularly disposed portions and each of said members having an end adapted to overlie each other to indicate the center of the Work, and a punch swingably carried by one of the members intermediate its ends and adapted for movement into and out of position over the overlying ends of the members to mark said center.

3. A center nder and marker comprising a frame including right angularly disposed portions adapted for receiving work at the inner angle thereof, an arm adjustably carried by one portion of the frame for movement relative to the other of said portions and adapted for engaging a side of the Work, and elongated members slidably carried respectively by the frame and the arm and disposed at right angles to each other, said member carried by the frame being disposed at an angle of 45 with respect to both angular portions of the frame, said members having an end adapted to cooperate with each other to indicate the center of the work:r

LLOYD P. BROWN.

REFERENCES CITED The following references are of record in the le ofA this patent:

UNITED STATES PATENTS Number Name Date 436,526 Henderson Sept. 16, 1890 FOREIGN PATENTS Number Country Date 471,564 Germany Feb. 14, 1929 

